
body {
  background-color: rgb(90, 90, 90);
}
.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 50px;
}

.loader {
  width: 6px;
  height: 30px;
  background-color: #fff;
  position: relative;
  margin-left: 15px;
}

@keyframes loading {
  0% {top: 0}
  50% {top: 20px}
  100% {top: 0}
}
.loader-1 {
  animation: loading .6s linear infinite;
}
.loader-2 {
  animation: loading .6s linear .3s infinite;
}
.loader-3 {
  animation: loading .6s linear .6s infinite;
}